Water-cooled valve or damper structure.



L. L. KNOX.

WATER COOLED VALVE 0R DAMPER STRUCTURE.

APPLICATION FILED DEC. 2T. I9l6.

Patented Feb. 12, 1918.

3 SHEETS-SHEET l.

n.. lllllll IlVll lil WITNESSES L. L. KNOX.

WATER COULED VALVE 0R DAMfER STRUCTURE. APPLIcATroN man 111215.21. |916.

1,256,330. Peeented Feb.12,191s.

3 SHEETSLSMEEI' 2- e L. L. KNOX.

WATER COOLED VALVE 0R DAMPER STRUCTURE.

APPLICATION FILED DEC. 2l. 1916. 1,256,330. Petented Feb.12,1918.

3 SHEETS-SHEE T 3.

INVENTOR ce mm ahum e Qu a Re* am UNITED STATES PATE onirica.

LUTHER L. KNOX, OF AVALON, PNNSYLVANIA, ASSIGNOR, BY MESNE ASSIGNMENTS,'IO BLAW-KNOX COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION 0F NEWJERSEY.

Specification of Letters Patent.

Patented Feb. 12, 1918.

Application led December 21, 1916. Serial No. 138,292.

'To all whom z't may concern:

Be it known that I, LUTHER L. KNOX, a citizen of the United States,residing. at Avalon, Allegheny county, Pennsylvania, have invented a newand useful Improvement in lVater-Cooled Valve or Damper Structures, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings. forming part of thisspecification, in which- Figure l is a vertical section of a portion ofaflue structure and of a valve or damper arrangement embodying myinvention;

. Fig. 2 is a section on the line II-II of Fig, l;

Fig. 3 isa partial top plan view of the valve or damper proper;

Fig. 4 is a view similar to Fig. 1, but on a lzlu'ger scale and showinga modification; an(

Figs. 5 and 6 are sectional views taken at right angles to eachother andshowing a stillwfurther modification.

My invention has relation to Water-cooled valve or damper structures.which are particul-arly designed for use in furnace or other flues whererelatively high temperatures obtain.

The object of my Vinvention is to provide --a structure of thischaracter which can be The nature ofv my invention will be bestunderstood by\reference to the acciompanying drawings, in which Il haveshown several modifications of my invention and which will now bedescribed, it being premised, however, that various changes can he madein the details of construction and arrangement of the several partsWithout depvtrting from the spirit and scope of my invention as definedin the appended clalms.

Referring to that form of my invention l shownin Figs. 1, 2, and 3, thenumeral 2 designates a portion of a flue stru.,turc and 3 designates avalve or damper-seating member which is seated in the walls of the fluestructure and is preferably supported at its lower end upon a raisedtransverse abutment 4 and the bottom Wall of theiue. This frame is alsopreferably seated in an oblique position so as to obtain a gravityseating action of the valve or damper against its seating face. Theseating member consists of a hollow water-cooled frame, preferablyformed of sheet metal and having therethrough the flue opening 5.

Secured to the top Wall of the flue is` a Water box or pan havingsubstantially parallel inner and outer walls 6 and 7, theinner -lowWater-cooled form, its watt-r space 9 being open or partially open atthe upper end and its upper edges being flanged outwardly, as V shown at10, and then downwardly, as shown at 11, to form a water-sealing apronor skirt which telescopes within the water spaces between the innei andouter walls of the Water box. One of the inner walls of said boxispreferably provided lwith anti-friction'rollers 12, against which thevalve or damper rests and travels.

At one side, the depending fiange 11 -is inset to form a vertical waterchannel 15, which extends downwardly the ful] depth of said flange. Theouter of this water channel is closed (as best shown in Figs.y1 and 3)by Ithe sheetl or plate member 16,

`which is secured to the valve.

17 designates a water supply pipe formed in two telescopic sections andextending downwardly within the water space of the valve or damper to apoint near the bottom of .such space where it terminates in a suitabledischarge'head 18. 19 designates any suitable lifting connections forthe valve.

The relatively cold water whch` is discharged within the lower` portionof'. the

8 designates the' water space of the valve rises and. overflows throughthe opening at the top of said. space, thence flows across the uppersurface of one ofthe flanges 9, and thence downwardly through the `waterpassage or charnel- 15, before described. In this manner, the overflowfrom the valve or damper preferably is carried down through the channel15, and is discharged into the lower portion of the water space of thewater box. The latter is providedat its upper portion. with an overflowpipe 20. This pipe may be carried to any suitable point of discharge orit may be caused to discharge into the receptacle 2l, thus givingopportunity for the flow of water to be observed in order to permit ofthe vready detection of stoppage from any cause.

The sealing flange or skirt 11 and the water box are of sufficient depthso that an efficient water seal is provided at all times, even when thevalve or 'damper is fully open.

If desired, the seating member may be provided with an auxiliary watersupply pipe 22, leading into its lower portion and provided with acontrolling valve 23. 2-l designates blow-out or clean-out plugs forsaid member. These plugs may extend into pits 25 at opp'osite sides ofthe iue structure for convenient access thereto.

In theI form of my invention shown in Fig. 4, the general constructionof the valve or damper and of the seating member is the same as in theform first described, and similar reference numerals have been appliedthereto with the letter a affixed. In this modification, however, I haveshown the water-cooled seating frame or member 3, as having a lining 26of refractory material. I have also shown the lower portion of thewater-cooled valve or damper as having an inset portion 27, at the sidewhich faces the'flow of hot gases, this inset being filled with arefractory body 28.

In lFigs. 5 and 6, I have shown another form of the water-cooled valveor damper having an inset portion 29, with a refractory filling orlining 30. In the form shown in Ithese figures, the valve or dampermoves in a vertical pl'ane instead of obliquely, the seating member 31is of cast metal instead of sheet metal, and instead of providing thewater-circulating and sealing arrangement of the forms just described,the valve worksv within a closed sealing chamber 32, mounted on a fluestructure.

My invention provides a highly eiiicient damper or valve constructionfor furnace and lother heating fines. The construction is a simple andcomparatively inexpensive one, since it'is'largely made from sheet metalplates preferably welded at the joints. The water circulation is carriedout in a highly efficient manner.

nel, substantially as described.

I claim: l. In a valve oridamper structure for furnaces,/the4combination with a hollow watercooled valve or damper member having avertical water passage or channel formed therein and there being aconnection between the water space of the-.valve or damper and saidchannel, substantially as described.

2. In a valve or damper structure for fines, the combination with ahollow watercooled valve or damper having a portion projecting throughand above the top wall of the flue structure,. said projecting portionhaving a surrounding depending sealing Harige or skirt, an open-topwater box mounted on the top of the flue structure and having inner andouter walls at each side of the valve or damper with water spaces'between such walls into which the said flange u or skirt depends,sai'dvflange or skirt having being a connection between the water spacekof the valve or damper and the said chan- 3. In a valve or damperstructure for furnaces, the combination with a hollow Waten cooled valveor damper member having a portion which in the closed position of thevalve or damper extends through and above,V

the upper wall of the fiuestructure, said extending portion having adepending watersealing flange or skirt, and-an open-top sealing boxmounted on the flue structure and into the water spaces of which thesaid 'flange 0r skirt extends, said Aflange or skirt having a verticalwater passage or channel formed therein and there being a connectionbetween the water space Vof the valve or damper and` said channel,together .with means for supplying cooling water to the interior of thevalve or damper, substantially as described.

4t. A flue valve or damper of hollow sheet metal form, the seatingpor-tion of 'said valve having an inset portion surrounded at the backand at its peripheral edges by the water space of the hollow structure,and a refractory lining or filler seated in said inset portion, thevalve or damper having a flat seating metallic face around the saidlining or filler; substantially as described.

5. A Hue valve or damper of hollow sheet metal form, the seating'portion ofsaidvalve having an inset portion surrounded ^at"i:he

. skirt extends, saidl fiange or skirt having a back and 'at itsperipheral edges by the In testimony whereof, I have hereunto set waiterspac of thehllllow struzture, aid a my hand.

re ractory ining or er s eate' in sai in- T set portion, said lining orfiller being of LUTHER L' KLOX' 5 arched form and retained in saidoffset by Witnesses:

its arched engagement therewith; substan- GEO. H. PARMELEE,

tially' as described. H. M. CORWIN.

